The difference between MIM and PM process

High pressure one-way rough metal powder pressed into a fixed position to create a moderately complex equipment with traditional PM. In particular, no further improve its density during sintering process. This method yields the density value between 80-90%, which limits its physical properties as alloy. At the same time, it also limits the PM process can only do a simple shape of the product.

Because the MIM is similar to plastic injection molding, it is not limited to the production of complex products. Fine metallic powder with high temperature sintering of the final product produced by MIM can reach very high density. This makes MIM products and precision materials with similar properties.

mim metal powder metallurgy process performance

mim metal powder metallurgy process performance including liquidity, filling properties, compression resistance and formability.

1. The charge characteristics

Means in the absence of external conditions, the tightness of the accumulation of powder free time. Often the bulk density or bulk density expressed. The size of the particles of the powder filling characteristics, shape and surface properties related.

2. Liquidity

Refers to the powder flowability, time used 50 grams of powder from a standard funnel flow time representation. Granule adhesion of liquidity by.

3. Compression

It indicates the ability of the powder metallurgy in the pressing process is compacted under pressure by a predetermined unit achieved green density expressed in standard mold, measured under the conditions specified lubrication. Factors affecting powder compressibility particulate plastic or micro-hardness, ductility metal powder than the hard, brittle material compression is good; the shape and structure of the particles also affects the compressibility of the powder.

4. formability

Refers to the powder compaction, the compact's ability to maintain a predetermined shape, the smallest unit capable of forming a powder compaction pressure, or by a strength of compacts to measure. Formability affected particle shape and structure.

Difference between metal injection molding and powder metallurgy（PM）

Metal injection molding is a method of powder metallurgy parts molding.

There are two kinds of powder metallurgy parts forming roughly: compression molding and injection molding.http://www.zcmim.com/

Compression molding has many different types. In practical industrial applications, my personal opinion is compression molding has much wider application. Closed steel cold pressing,  isostatic cool pressing, isostatic hot pressing, and warm- pressing are all belong to compression molding .

Compression molding, it refers to  fill dry powder into a mold by force and extrusion molding by external pressure.

Metal injection molding refers to inject a large number of very fine powder into shaping mold by adding thermoplastic binder.

Besides, there are other two special powder metallurgy parts processing: powder forging and powder rolling.

Characters for powder metallurgy technology（Second）

Following last article about analysis characters for powder metallurgy technology, other characters as following (reference from ZCMIM): 

Powder metallurgy can not melt the materials and mix any impurity in the course of production, and metal components are sintered in vacuum condition. 

It unable bring any pollution, so it can prepare high-purity materials with powder metallurgy process.

It can ensure correctness and uniformity of material matching for powder metallurgy.

Powder metallurgy is suitable for produce the same components in mass production, especially for machining gears of high cost, it can reduce the production cost greatly.

Characters for powder metallurgy technology（Second）

Following last article about analysis characters for powder metallurgy technology, other characters as following (reference from ZCMIM): 

Powder metallurgy can not melt the materials and mix any impurity in the course of production, and metal components are sintered in vacuum condition. It unable bring any pollution, so it can prepare high-purity materials with powder metallurgy process.

It can ensure correctness and uniformity of material matching for powder metallurgy.

Powder metallurgy is suitable for produce the same components in mass production, especially for machining gears of high cost, it can reduce the production cost greatly.